To quote myself:
Thanks for this since I've not read any of the novels.
Seeing as how Maul died in the book, but was then retconned into being alive through the Clone Wars cartoon, the same can be done for Windu.
These are the real problems. Not how realistic his survival was. Bringing major characters back after death is always a bad idea and never works e.g. Palpatine Reborn. Minor characters however, work. Because there is plenty of room for expansion.
And you still haven't told me how Yoda, Sidious or Vader didn't feel him through the Force and find him. Basically your reasons for bringing him back seem pointless, he wasn't a minor character, he needs no expansion. We know Windu and he has served his purpose.